Pencil sharpener



FIG. 1 is a front perspective view of a pencil sharpener, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is another side elevational view thereof taken opposite to that shown in FIG. 5;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a pencil sharpener, as shown and described. 